The statement above is TRUE.
In evolution, there are different level of succession. Ecosystems usually start out as barren lands or barren rocks; over the course of time, different types of plants and animals will exist on the land and eventual died out and this will continue until the ecosystem has attained its full succession.<span />
Answer: Animals release CO2, required for photosynthesis.
Explanation:
Answer:
The correct answer is B. nitrogenous bases
Explanation:
Double-stranded DNA is the genetic material in almost all the living organisms present on the earth. This DNA is present in a helical form. Each DNA strands us made up of nucleotides which are joined together by phosphodiester bond.
DNA is made up of two DNA strands therefore the two DNA strands are also joined and the two strands are joined together by hydrogen bond formation between two complementary nitrogenous bases.
These nitrogenous bases are adenine, guanine, cytosine, and thymine. Adenine and thymine are complementary to each other and guanine and cytosine are complementary to each other. Therefore the right answer is B.
She was an English chemist and x ray crystallographer who made contributions to the understanding of the molecular structures of DNA,RNS,viruses,coal, and graphite<span />